Spark-plug.



No. 865,212. PATENTED SERT. 3, 1907.

G. w. SAGE. I'

SPARK` PLUG. APPL'IOATIO'N PILL'D'YFHAY 26. 1998.

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y line 1-1 of Fig. 3; Fig; 21's GEORGE w. SAGE, oF EUREKA, CALIFORNIA.

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No. 865,212. Q

Speccation of Letters Patent.l

Patented sept. 3, 1907.

Application lod Hay 26,*1906-5-"n8eria1'1m 818,659.

To aLl whom it may concern:

Be it known that 1,' GEORGE W. SAGE, a citizen of the United States, and a resident of Eureka, in the county of Humboldt and State of California, have invented a new and Improved Spark-Plug, of which the following is a full, clear, and enact description.

My invention relates to an igniter of the make and break or contact and release the charge of gas-for vinternal'coinbustion engines, and the object of the invention is igniter of this typeihich may be` used efectuallyon high speed engines. f i

Heretofore igniters of the make and break type have not been successful in high speed engines owing to the `mechanical difiicultiemof driving complicated parts at high speeds, and to the inability of ordinary springs to recoil with suflic'ient rapidity. *To overv come this diiiiculty I a regularly movingelectrode which instead of coactding with a single relatively fixed electrode makes cony 4tact and release in constant order with a plurality of electrodes, Vthe action of the'mving electrode being so timed that contact and release and consequently a spark occurs once during each cycle of the engine whether the same is the two yor four cycle type. The engine, therefore, be-Idriven with great speed, yet keeping the speedof the igniter parts down to that at which they may operate with certainty and durability.

The invention involves various other features of ma4 jor or minor importance, 4and all will be fully`setforth hereinafter and particularly pointed out in the claims'.

Reference is to be had to the accompanying drawings which illustrate fas an exampleA the preferred em,- bodimentof my invention, infwhich drawings Figure I1 is a sectional view of the spark plug on the an inner side elevation of the same; and Fig.3 is an outer side elevation.

The plug comprises a body 10 which is adapted to be fastenedinto-an orifice in the walls of the cylinder or cylinder head by bolts in the usual manner. -Mount- Aed in this body 10 is a constantly rotating electrode -l1 adapted to be connected at its outer end with any suitable mechanismr for driving it 4andhaving atits inner end a contact 12 projecting `laterally therefrom. This contact is adapted successively to engage'and release similar contacts 14 and 15 on electrodes 16 and 17. These electrodesare yieldinglymounted on the body 10 of the plug, and are 'insulated therefrom by bushings 18, as shown. y

19 indicates a bracket plate which is supported' by the electrodes 16 and 17, and this bracket plate 4is provided with springs 20 and, 21 whichare connectd by primarily to provide an.y

.have constructed an igniter with type, adapted for firing pins 22 and 23 respectively with the electrodes 16 and 17. One terminal of the circuit'is grounded on the engineand is, therefore, in connection with the elec# trode 11 through the body 10, While the other terminal is connected to the ,bracket plate/19 by a bind- I ing screw 24 (see Fig. 3) s thatl the electrodes land 17 are energized. Projections 22 and 23 are arranged on the-bracket plate 19, to limit the movement of the pins 22 and 23 respectively in one direction.

The Contact point 12 and the contact points 14 and 'l5 are projected into 'the working cylinder, and the electrode 11 rotating ata constant speed alternately contacts with the, points 14 and l5. In case the invention is applied to'a two cyclekenginetthe electrode 11 is made to rotate at hall the 'speed of the-crank shaft of the engine, so that. the `Contact 12 makes a' spark with, for example, the contact'14 for one explo- .sion in the working cylinder, while a sparkis made with the contact 15 for the next following explosion.

It is clear that by increasing the number of electrodes similar to the el'ectrodes 16 and l17 the speed of the shaft-11 may be still further reduced, *This invention, therefore, enables -me tQ use a make .and break ignition system on high speed engines without' necessitating rotating or otherwise driving the parts ofthe igniter at the high speed at which the engine shaft itself rotates. Not only does this rende! the action of the parts much less destructive than heretofore but it also so reduces the speed and time of operation as v'to enable the springs 20'and 21 efectually to return, the Vrocking electrodes 1.6 and 17 after each operation.

Having thus described the preerred'form of my in; vention, what I actually claim and desire to secure by Letters Patent is:

l.' A contact and release igniter, comprising `a body, 'al

rotary electrode mounted rotation in the body at respectto the first-named thereon, electrodes mounted for spaced angular intervals with electrode and insulated from `the body, said last-named electrodes being provided with projections for engagement by the rotary electrodes, bracket plate sunported by the electrode, and springs connected with the eiectrmiersimd` the bracket. f

2 A. contact and release igniter having@ body, a rotating electrode mounted therein, rockingnelectrodes mounted in and insulated from rotating electrode, and means for hding the rocking electrodes in normal position, said means comprising a bracket plate, and springsconnecting the bracket plate and the rocking electrodes. Inytestimony whereof I have signed my name to this specication in the presence o t two subscribing witnesses.

.snollen W. SAGE. Witnesses DENVER SEvmn, An'rnun WomrMAN.

the bbdy and adapted to be 

